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Species · Alabama · BBS 2025 Release · 1966–2024

Cerulean Warbler Population Trend in Alabama

All statesForest birds

Cerulean Warbler in Alabama has edged down: down 19% on the route-weighted index since 1970.

-19%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
11Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Cerulean Warbler Trends in AlabamaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Cerulean Warbler in Alabama. See the full index history below.

Cerulean Warbler Survey Routes in Alabama

Routes recording Cerulean Warbler in Alabama.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Elkmont319911991
Millerville219711971
Greensport220002000
Youngtown219971997
St Florian119971970
Hillsboro119881979
Valhermoso Spgs119691968
Vernon119971997
Mt Olive119701970
Grove Hill119881988
Carrollton119961996

Cerulean Warbler Population Trend in Other States

arkansasconnecticutgeorgiaillinoisindianakentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniatennesseevermontvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.